21374403430736 has 40 divisors (see below), whose sum is σ = 42381795766464. Its totient is φ = 10437233829120.

The previous prime is 21374403430729. The next prime is 21374403430801. The reversal of 21374403430736 is 63703430447312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2915045 + ... + 7158651.

Almost surely, 2^{21374403430736} is an apocalyptic number.

It is an amenable number.

21374403430736 is a deficient number, since it is larger than the sum of its proper divisors (21007392335728).

21374403430736 is a wasteful number, since it uses less digits than its factorization.

21374403430736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250979 (or 4250973 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 47.

The spelling of 21374403430736 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred three million, four hundred thirty thousand, seven hundred thirty-six".